Spi 91-361-6 Feeler Gauge 0.008 Inch Parallel Leaf

Product Description

The SPI 91-361-6 is a single parallel-leaf feeler gauge used to measure precise gaps and clearances in mechanical systems. Manufactured from high carbon steel, this gauge delivers consistent thickness accuracy for tasks such as checking spark plug gaps, valve clearances, carburetor settings, and bearing fits. The leaf measures 0.008 inches thick, 0.5 inches wide, and 12 inches long, giving technicians a generous reach into tight service areas. HVAC technicians, machinists, and mechanical service professionals use feeler gauges like this one as a standard part of their precision measurement toolkit.

This feeler gauge is suited for residential and commercial HVAC service, general mechanical maintenance, and light industrial applications where gap measurement is required. The parallel leaf style provides uniform thickness along the full 12-inch length, making it reliable for contact measurements across the entire blade. It is commonly used during burner orifice checks, blower wheel clearance verification, and equipment assembly tasks requiring controlled tolerances.

Key Features

• Parallel leaf style maintains consistent 0.008 inch thickness across the full blade length
• High carbon steel construction for durability and resistance to deformation under repeated use
• 12 inch leaf length provides extended reach into confined spaces
• 0.5 inch leaf width offers a practical contact surface for gap measurement tasks
• Single-leaf format for easy handling and direct measurement without separating from a set

Compatibility

Designed as a general-purpose parallel-leaf feeler gauge suitable for gap and clearance measurement applications across HVAC, plumbing, and mechanical service work.

Installation Notes

Feeler gauges require no installation but should be used by qualified technicians familiar with the tolerance specifications of the equipment being serviced. Always power down or de-energize equipment and relieve any system pressure before inserting the gauge blade into a service point. Keep blades clean and free of debris to maintain measurement accuracy. Do not bend or force the leaf beyond its natural flex, as permanent deformation will compromise gauge accuracy.